condition mean min max 0 h after light 2.8012 2.65626 2.94614 4 h after light 5.19259 3.63091 6.75427 8 h after light 4.65813 4.51787 4.79839 4 h after dark 6.309045 4.62957 7.98852 8 h after dark 6.119605 5.94824 6.29097 12 h after dark 6.61816 6.4728 6.76352